2021 Audi Q8 Central Locking / Parking Brake Warning TSB

Audi has issued Technical Service Bulletin (TSB) 2055932/10 to address various issues related to the central locking system, parking brake, exterior mirrors, and alarm system in certain 2021 Audi vehicles, including the 2021 Audi Q8. This TSB, dated December 12, 2024, supersedes a previous bulletin, Group 57 number 23-06, from May 5, 2023. The primary solution involves updating the software for the affected control modules.

Important Warning for Specific Models

Owners of 2021 Audi A6, A6 allroad, and A7 models should not follow the instructions in TSB 2055932/10 directly. Instead, these vehicles require Campaign 72K6, which incorporates the necessary software update detailed in this TSB.

Symptoms Owners May Notice

Owners of affected 2021 Audi Q8 vehicles may experience one or more of the following issues:

• Warning messages appearing in the instrument cluster, such as "Central locking malfunction!", "Parking brake malfunction!", or "Child Lock malfunction!".
• The vehicle's alarm system activating unexpectedly when opening the vehicle using the Advanced key.

Fault Codes / DTCs

Technicians diagnosing these issues may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in various control modules:

Diagnosis / Trigger Conditions

Workshop investigations have revealed that the affected door might temporarily not unlock electronically from the inside, though mechanical opening remains possible. Historical data from alarm activations often points to the door contact switch as the root cause for the alarm going off. The underlying cause for these symptoms and the 2021 Audi Q8 central locking warning is identified as outdated software.

Repair Procedure Summary

The recommended repair for the 2021 Audi Q8 central locking warning and related issues involves a software update to the door electronics control modules (J386, J387, J388, J389). This update addresses the condition by installing new software that has been developed to resolve the implausible signals and malfunctions.

Here's a summary of the repair steps:

1. Refer to SVM Operating Instructions: Technicians must follow all instructions outlined in TSB 2011732, titled "00 Software Version Management (SVM), operating instructions."
2. Prepare Door Control Modules: Before performing the SVM update, all windows must be rolled completely down and then back up. This action ensures that the door control modules are active and ready for the update.
3. Perform Software Update: The door electronics control modules (identified as 0042 for drivers, 0052 for passenger, 00BB for rear driver's side, and 00BC for rear passenger side) are updated using the SVM code 42A021.
4. Basic Settings for Windows: After the software update, basic settings for all four windows must be performed.
5. Cycle Child Lock: Following the SVM update, it is crucial to cycle the child lock feature on both rear doors to ensure proper functionality.

Warranty Information

Warranty claims for this repair should be submitted in accordance with the Audi Warranty Policies and Procedures Manual. The Service Number for this procedure is 6438, and the Damage Code is 0039. Labor operations for the software update include codes 0151 0060 (time stated on diagnostic protocol) and 0151 0010 (see SRT with associated operations). Claims should reference TSB 2055932/10.

Source: NHTSA ID: 11012494